4400+ X2, 2 GB memory, Vista Ultimate, 1950xt.
Running @ 1680x1050, all effects maxed. Pity there does not appear to be any AA in this game, but the game itself runs decent enough. I am averaging in the mid-40's with the occasional dips to the mid-20's and peaks in the 60's.
I am not exactly giddy at the quality of the game (that ridiculous background texture in teh opening section past the light-house made me laugh harder than any crap texture in a game in the past 2 years) but once you get inside, the levels aren't bad.
You know its an Xbox port by how poorly the controls are mapped and you move and react, but there is enough to keep you plugging along. I am only about an hour or so in the game at the moment.
Some screenshots posted below. I thought I was capturing with the FPS counter mapped to the picture but unfortunately I turned it off for some reason
Only the picture with a lot of water was in the 30's (about 35fps), all the others were in the 40's and 50's.